IEEE 802.22 is a standard for wireless broadband access that uses the so-called white spaces between occupied channels in the TV frequency spectrum. The aim of the standard is to bring broadband access to low population density areas. The maximum data rate is about 20 Mbit/s. Due to its cognitive radio techniques, it has the potential to be applied in many regions worldwide.
The standard uses the WiMAX (IEEE 802.16) double binary turbo codes with different interleaver parameters and block sizes. Turbo coding is optional, only support for convolutional coding is mandatory.
|Wireless Regional Area Networks (WRAN)—Specific requirements
Part 22: Cognitive Wireless RAN Medium Access Control (MAC) and Physical Layer (PHY) Specifications: Policies and Procedures for Operation in the TV Bands
|Applications||Wireless Regional Area Networks (WRAN)|
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|Turbo Codes||Double binary parallel concatenated convolutional code (PCCC), 8 states, code rates 1/2, 2/3, 3/4, 5/6, tail-biting, payload block sizes 48 – 1920 bits.|